Self-inking rubber stamp



April 16, 1946.

J. L. WEISENTHAL SELF-INKING RUBBER STAMP Filed June 25, 1944 INVENTOR. I Jasepk LMLSPIM Patented Apr. 16, 1946 UN I TED STATES PATENT OFFICE SELF-IN-KING RUBBER STAMP Joseph L. 'Weisenthal, Bronx. N. Y.

Application June 23, 1944, Serial No..-541,707

Claims.

Thi invention 'relatesitomew andmsefulximprovements in a self-inkingrrubberz.istamp.

.Mor specifically, theinventioniproposes the construction .of "a self-inkingistamp which providestan improvement :toverithe present day runber'stamps :by .obviatingithe:necessity .of:pressing the rubber stamp onto an ink soakedxstamp .pad before Leachnse of the .rubber stamp. The invention proposes providing :the inking pad as an integral unit WithLthe constructionof'the rubber stampnto permit thei'rubber stamp to lb xinked with' the same motiong'consisting in 'pushing'l the rubbersstamp, which isusedto accomp ish the impressionof the rubbert -stampcupon the surface.

to be imprinted.

Arfurther object of the invention: roposes the provision of "a rubber Istamp .characterized by a housing enclosing a movable rubber tamping olie in which the rolling motion of the :component parts Will cause the. rubber stamp die to be inked and "at the same time accomplish the impression of the. materialprovided on the: rubberdie.

Still another object of' the invention proposes providing a pressure roller and idler roller-with an endless belt engaged over these rollers for supporting the.rubbendietofbamoved into position beneath the pressure "roller as the rollers are turned.

Stillanother object ofthe invention proposes an arrangement of'a novel brake mechanism' in connection with the .en'dlesslbeltz for-stopping the endless'belt in a: finished position'of the rubber di strip witha means for moving the. belt 'to project the rubber die strip into a. starting position.

It is also possible to Iconstructthe"self inking rubber stamp .with "a single wheel or with two rollers in intimate "contact. with each other, with meshing gear teeth'providing the driving connection between the rollers to a'dvance' the rubber die strip. Itis alsolproposed that the selfinking rubber die stamp heshape'd'inthe form of a statuette, paperweight or other=similar article'which will. enhanceits appearancewhen positioned upona desktop. .Still another object of the invention proposes constructing the selfinking rubber stamp in the form 'of a fountain pen and to provide itwith a pocket clip by which it can be -conveniently carried in ones pocket.

Another object of the invention propose providing the self-inking rubber stamp with a plurality of adjacent rubber dieistrips to be'inked from a common inkingzrol-ler 'andeachof which is provided with a. mechanism for moving it into a startingstamping position; the housing of which is provided'with. position-indicating guide lines.

Another object of aithi .1 invention proposes a plurality :of rubber Edie strips attached in' vertical sequence Site the endless :belt with suitable spacing and brakingmeanssecured thereon. Codeidentificaticn means for correlating the sequence of rubbercdiesere "obtained .byt-theiplacing of iden tical: signs: on: the housing and before the respective dietstrips.

It is a further object ofithis invention toconstruct a self inkingirubher'rstampwhich is simple and durable and which may be manufacture'd and sold at a reasonablecost. i

Forlfurther comprehension of the invention, andof theobjects andcadvantages'thereof, reference will be had to the following description and accompanying drawing, and to the appended claim in which the various novel features of the invention ar more particularlys' set forth.

Inthe accompanying drawingforming a material part of this disclosure:

Fig. I 1 is a perspective view of a' self inking rubber stampcohstructe'd in 1 accordance with this invention.

Fig.2 isa rear elevational view of Fig. 1.

Fig. 3 is an enlarged vertical sectional View taken on the line 3-3 of Fig. 2.

Fig. 4 i a vertical sectional view taken on the line"'4--4 of Fig;' 3.

Fig. "5 i a partial enlarged vertical sectional view taken on the' line 5- 5 o'f Fig. 3.

Fig.1? is a perspectiveview' ofa self-inking rubber stamp constructedin-accordance-with a modification of this invention.

' The self-inking rubber stamp-according tothis invention, includes'ahousing l-D having an opening through which a movablerubber die may project. The housing I 0 is preferably constructed of'sheet metalyplastic, or other. similar material and i provided at its top with an upwardly extended handle 12. The opening ll through which the rubber die is adapted to project i provided by cutting away oneof the .bottomcorners. of the housing'lfl. .Theremaining portion of .the bottom wall of the housing lflprovide a convenient rest by which the device maybe rested in a vertioalposition upon the-desk or other flat surface. Extended laterally across the interior of the housing H] thereare providedzshafts I3,-|4, and I5. These-shaft are rotatively' extended between t e side walls 'ofthe "housing. 1 (land carry spaced support braces lt. A'pressure roller I! isrctatively mounted upon the shaft I4 :between'the braces l6 and has 'a portion'ofits periphery'projected 'through the opening II. An idler roller l8 is mounted upon the shaft 13 also between the braces 16.

At laterally spaced positions the rollers l1 and l8 are provided with projecting sprocket teeth l9.

An endless belt 20 engages over the rollers l1 and i8 for supporting a rubber die. The endless belt 20 is provided at laterally spaced positions with openings 2! adapted to be engaged by the sprocket teeth IQ for evenly advancing the endless belt 20 as the rollers HandlB turn.

A thick rubber dietrip 22 is mounted upon the face of the endless belt 20. This thick rubber die strip may be vulcanized, glued or in any other similar manner attached to the endless belt 20. The exposed rubber die stamp 22 is 'embossedcut;

idler roller l8. The arrangement of the ratchet wheel 35 and the pawl 36 is such that it insures an advancement of the idler roller l8 when the rack 39 moves downwards and also permits the gear 29 to turn independently of the idler roller l8 when the rack 30 moves upwards under the influence of the spring 34. The arrangement of the ratchet wheel 35 and the pawl 36 permits the roller !8 to rotate independently of the gear 29 whenthe rollers .l'l and.l8 are advancing the end lessbelt20,',

Wheels 31 aremounted on the shaft [4 on either side of the pressure roller l1 between the molded, or in any other manner provided with the message to be imprinted. While it is pre ferred that this die strip be constructed of rubber a it may be constructed of any other similar materials capable of retaining ink and making an impression without smudging.-

inking roller 23-is provided for inking. the. surface of therubber diestrip22. This ink roller 23=is 'rotatively positioned upon the shaft between the braces I6; The back .wall of the housing I0 is provided with-a pivotally supported door. 24 through which inking roller 23 may be reached to be re-inked or changed, when the door-ispivoted to an open. position. A A smallknob 25 is mounted upon the. ireeedge of. thedoor 24. providingagriprz A brake is provided for stoppingthe belt 20 in a position in which the rubber-die striptwill have just finished a printing operation. This brake is characterized by a small, triangular projection 26'extended laterallyfromone side of the endless belt 20. The brace I6 at-the side of the endless belt 20 provided with the triangular projection 26. is.provided with a rearwardly extended extension 21. This extension 2! isprovided with a cutout 28. in: which the triangular projection 26 is adapted to engage to prevent .further movement of the endless belt 20 except under forcejdisen gaging the triangularprojection 26 from the-cut out28.- i J A novel means is provided for. advancing the beltto advancetherubber die strip 22 from a position in which it has just finished a stamping operation into a position to start another stamping operation. This means is'characterized byja gear 23 rotatively mounted upon shaft I3 between the adjacent faces .of the; idler roller lfland its adjacent brace I6. This gear. 29gmeshes with a rack39. The bottomendot the'rack30 is retained in an engaged position with the gear 29 by means of an extension 3| .from the bracelfi which engages aboutthe bottom end of the rack 30 The top end "of. the rack 36 islprovided with a stem 32 whichextends from' the top of the housing land is' provided at its outer end with a knob 33.. Pressure is adapted to be applied to the knob 33 to urge the stem inwardsjpressing the rack 30 downwards to rotate the gear 29. An expansion spring 34 is coaxially woundupon the stem' 32 and operates between the top of the housing' lll and theknob 33 urging the stem 32 into itscOmpletelyeXtended position. The stem 32 has a square or irregularly shaped cross section and extends through a'similarly-shaped opening in .the topwof the housing .to' prevent rotating thereof and assist in retaining the rack 30in a position in which itwill mesh with the gear 29..

One side-of the gear 29 is provided with an integral ratchet wheel 35 engaged by a spring pressed pawl 36 mounted .upon the end vof the braces 16 and extending from the opening H. The'wheels 3'! are of a diameter to extend from the opening [I a lesser distance than the rubber die stamp for supporting the housing when the end of the rubber die strip passes the opening l l preventing the endless belt 20 from contacting the surface being imprinted.

.Theumanner of using-theself-inking rubber diestampisias follows: v

. Normally. the. parts of the self -inking rubber die stampwill appear as shown in Figs. 3 and 4 and the stamps. may be rested in. avertical position upon aidesk or other flat'surface .to appear as ShOWlflviD. Fig. 1.. To use-the rubber die stamp the handleyl2 is gripped in one hand and the housing isiextended .intoarearwardly inclined position-inwhich-the opening II will be parallel to the surface of the paper or other article uponwwhich.theaimpression is to bemade. Inthis position :thestem 32;.is urged inwards against the the action: of. the spring .34 rotating the gear 29 through the medium of the rack 30. The. pawl. and. ratchet wheel arranged between the gear ,29 and the-idler rollerel8 will be locked causingvtheidler roller;l.8 tobe rotated. This will advance the endless belt moving the triangular projection 26,-, forming the brake, out of an engaged position with. the cutout 28. One complete inwardmovement of: the stem-:32 will advance the rubbendiestrip .22 fromva position in which it is. just ,finished-ja stamping operation, as shown in Fig. 3," into a, starting-position in: which the forward end of the rubber die strip .22-will be in a position beneath thepressure roller l1. Since the rubber die strip 22 is of a thickness to project YQndthe-wheels 31.the endof the rubber die strip 22 .willnowengage the surface to be imprinted, The stem. 32 may now be released and thespring 34 will urge it upwards into a position shown inFigsztl and 2. On this return movement of the stem 32the. rack Twill be moved rotating thelgear 29 and the ratchet wheel which will idle past thespring pressed pawl 36.

"I'hedevice' is now ready-to'imprint. This is accomplished by applying pressure to the handle thereof as ,the device is pushed forwards. This will cause the .rollers l1 and Hi to be rotated advancing the rubber die strip 22 past the inkingv roller 23which will ink the surface of the die strip 22wtoacauseit tomake an impressi0n.- This operation may be continued until the endless belt 25 makes one complete revolution reengaging thetriangular projection 26 with the cutout 28 to restrain a-free movement of the endlessbelt' 20. --In this position the rubber die strip will. have-just finished a stamping operation. 1 For the next stamping operation the above procedureis repeated.

It. is toberememberedtha't the:.door 24 may be. openedvfor thepurpo'se of replenishing the supply of, ink on the inking roller: 23 or for replacing this .inkingiroller. when desired. 

